PROSOFT AN-X2-AB-DHRIO 数控PLC通讯卡
更深的槽用于扩大针阀的头部并增加摩擦力，以防止因改变针阀设置而引起的振动。如果必须使用普通螺丝刀，一定要使用针阀的浅槽。让原动机摆动约30秒，以排出调速器油道中的滞留空气。2.松开固定补偿指针的螺母，刚好使指针尽可能降低，以获得最小补偿。再次拧紧螺母。补偿调整程序的目的是找到补偿针阀和补偿调整指针的特定设置，在该设置下，发动机、涡轮机或其他类型的原动机在速度扰动后仅轻微过冲或下冲（补偿指针调整）即可快速恢复速度（针阀调整）。3.逐渐关闭针阀，直到振荡停止。如果振荡没有停止，打开针阀一圈，并将补偿指针向上移动前面板指示器刻度上的一个标记。再次逐渐关闭针阀，直到振荡停止。如果振荡没有停止，将针阀打开1/4圈，并重复将补偿指针向上设置一个标记。重新测试调速器，直到振荡停止。
本手册的“发动机测试程序”部分给出了转速下降、高速和低速停止以及停机螺母调整。除非您完全熟悉正确的程序，否则不要尝试对调速器进行内部调整。补偿调整针阀和调整指针是补偿系统的可调整部件。它们的设置直接影响调速器的稳定性。补偿必须根据特定的发动机和负载进行适当调整，以提供稳定的运行。当发动机或涡轮机在调速器充油后首次启动时，调速器可能在恒定速度下稳定，但调速器可能需要调整。负载变化后的高速和低速以及缓慢恢复到正常速度表明需要进行补偿调整。最大补偿设置通常提供稳定的稳态操作，但在负载变化时会导致更大的断开速度。调速器中的油达到其正常工作温度后，在原动机无负载的情况下进行以下补偿调整，以确保调速器提供最佳控制。调整部件的位置见图1-1。1.要排出调速器油道中的滞留空气，首先拧松固定补偿调节指针的螺母，使指针处于其向上的极限位置，以获得最大补偿。接下来，拆下针阀检修塞并逆时针打开针阀两圈。使用十字螺丝刀避免损坏孔内的螺纹和针阀。螺纹或针阀损坏会导致调速器有节奏地更换燃油。这就是所谓的州长狩猎。有关狩猎的更多信息，请参阅第5章。针阀中有两个螺丝刀槽，一个浅槽和一个深槽，彼此成直角。
The deeper slot is used to expand the head of the needle valve and increase friction to prevent vibrations from changing the needle valve setting. If a plain screwdriver must be used, be sure to use the shallow slot of the needle valve. Allow the prime mover to hunt for approximately 30 seconds to bleed trapped air from the governor oil passages. 2. Loosen the nut holding the compensation pointer just enough to lower the pointer as far as it will go for minimum compensation. Tighten the nut again. The objective of the compensation adjustment procedure is to find the particular settings for the compensation needle valve and compensation adjustment pointer at which the engine, turbine, or other type of prime mover will return quickly to speed (needle valve adjustment) after a speed disturbance with only a slight over or undershoot (compensation pointer adjustment).
After the oil in the governor has reached its normal operating temperature, make the following compensation adjustments without load on the prime mover to be certain that the governor gives optimum control. See Figure 1-1 for location of the adjustment parts. 1. To bleed trapped air from the governor oil passages, first loosen the nut holding the compensation adjusting pointer enough to set the pointer at its extreme upward position for maximum compensation. Next, remove the needle valve access plug and open the needle valve two turns counterclockwise. Use a Phillips screwdriver to avoid damage to the threads inside the bore and to the needle valve. Damage to the threads or to the needle valve will cause the governor to change fuel rhythmically. This is called governor hunt. See Chapter 5 for more information on hunting. There are two screwdriver slots in the needle valve, a shallow slot and a deep slot, located at right angles to each other.
Speed droop, high and low speed stops, and shutdown nut(s) adjustments are given in the “Test Procedures on the Engine” section of this manual. Do not attempt internal adjustment of the governor unless you are thoroughly familiar with the proper procedure. Compensation Adjustments The needle valve and adjusting pointer are adjustable parts of the compensation system. Their settings directly affect governor stability. Compensation must be properly adjusted to the particular engine and load to provide stable operation.When the engine or turbine is started for the first time after the governor has been filled with oil, the governor may be stable at constant speed, yet the governor may need adjustment. High overspeeds and underspeeds after load changes and slow return to normal speed indicate the need for compensation adjustment. Maximum compensation settings generally provide stable steady state operation but result in greater off-speeds on load changes.